No, nukes shield the UK from any conventional attack, and provide us with geopolitical freedom for a relatively tiny cost, where in it's absence the UK would be effectively a toy to be fought over by other nuclear powers.
Also the anti-nuke lobby seems to be constructed more on misguided fear and ignorance rather than sound logic (beyond rather petty money saving, which is pointless since defence spending is 2.2% GDP and constantly being cut further down, and Trident is a mere fraction of the defence budget.
Weird to fear and hate nukes, seeing as they've done more to keep the peace between major powers than all other good intentions combined.